120 lines
3.0 KiB
JavaScript
120 lines
3.0 KiB
JavaScript
// kinds.ts
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var FileMetadata = 1063;
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// nip94.ts
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function generateEventTemplate(fileMetadata) {
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const eventTemplate = {
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content: fileMetadata.content,
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created_at: Math.floor(Date.now() / 1e3),
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kind: FileMetadata,
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tags: [
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["url", fileMetadata.url],
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["m", fileMetadata.m],
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["x", fileMetadata.x],
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["ox", fileMetadata.ox]
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]
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};
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if (fileMetadata.size)
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eventTemplate.tags.push(["size", fileMetadata.size]);
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if (fileMetadata.dim)
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eventTemplate.tags.push(["dim", fileMetadata.dim]);
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if (fileMetadata.i)
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eventTemplate.tags.push(["i", fileMetadata.i]);
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if (fileMetadata.blurhash)
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eventTemplate.tags.push(["blurhash", fileMetadata.blurhash]);
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if (fileMetadata.thumb)
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eventTemplate.tags.push(["thumb", fileMetadata.thumb]);
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if (fileMetadata.image)
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eventTemplate.tags.push(["image", fileMetadata.image]);
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if (fileMetadata.summary)
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eventTemplate.tags.push(["summary", fileMetadata.summary]);
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if (fileMetadata.alt)
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eventTemplate.tags.push(["alt", fileMetadata.alt]);
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if (fileMetadata.fallback)
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fileMetadata.fallback.forEach((url) => eventTemplate.tags.push(["fallback", url]));
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return eventTemplate;
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}
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function validateEvent(event) {
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if (event.kind !== FileMetadata)
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return false;
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if (!event.content)
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return false;
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const requiredTags = ["url", "m", "x", "ox"];
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for (const tag of requiredTags) {
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if (!event.tags.find(([t]) => t == tag))
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return false;
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}
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const sizeTag = event.tags.find(([t]) => t == "size");
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if (sizeTag && isNaN(Number(sizeTag[1])))
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return false;
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const dimTag = event.tags.find(([t]) => t == "dim");
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if (dimTag && !dimTag[1].match(/^\d+x\d+$/))
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return false;
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return true;
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}
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function parseEvent(event) {
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if (!validateEvent(event)) {
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throw new Error("Invalid event");
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}
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const fileMetadata = {
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content: event.content,
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url: "",
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m: "",
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x: "",
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ox: ""
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};
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for (const [tag, value] of event.tags) {
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switch (tag) {
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case "url":
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fileMetadata.url = value;
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break;
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case "m":
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fileMetadata.m = value;
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break;
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case "x":
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fileMetadata.x = value;
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break;
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case "ox":
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fileMetadata.ox = value;
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break;
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case "size":
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fileMetadata.size = value;
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break;
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case "dim":
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fileMetadata.dim = value;
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break;
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case "magnet":
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fileMetadata.magnet = value;
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break;
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case "i":
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fileMetadata.i = value;
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break;
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case "blurhash":
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fileMetadata.blurhash = value;
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break;
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case "thumb":
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fileMetadata.thumb = value;
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break;
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case "image":
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fileMetadata.image = value;
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break;
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case "summary":
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fileMetadata.summary = value;
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break;
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case "alt":
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fileMetadata.alt = value;
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break;
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case "fallback":
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fileMetadata.fallback ??= [];
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fileMetadata.fallback.push(value);
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break;
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}
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}
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return fileMetadata;
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}
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export {
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generateEventTemplate,
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parseEvent,
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validateEvent
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};
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